S03E04: The Joy

When Miss Simian sees Gumball and Darwin joyful on Monday, she knows that something is wrong with them. She performs tests on them, but the nurse disapproves what she's doing. But suddenly, Gumball and Darwin start to infect the school with the 'Joy Virus', and it's up to Miss Simian and her tape player to cure the students.

Season 3

Nicolas Cantu
Nicolas Cantu
Gumball Watterson (voice)
Kyla Kowalewski
Kyla Kowalewski
Anais Watterson (voice)
Donielle T. Hansley Jr.
Donielle T. Hansley Jr.
Darwin Watterson (voice)
Christian J. Simon
Christian J. Simon
Darwin Watterson (voice)
Teresa Gallagher
Teresa Gallagher
Nicole Watterson / Penny Fitzgerald / Teri / Mrs. Robinson (voice)
Dan Russell
Dan Russell
Richard Watterson / Patrick Fitzgerald (voice)
Kerry Shale
Kerry Shale
Larry Needlemeyer / Leslie / Bobert / Hector / Additional Voices (voice)